Emerson Rosemount 8600 Series - Electronics Test Points

69
Rosemount 8600 Vortex Flow Meter
Reference Manual
May 2019
Troubleshooting
00809-0100-4860, Rev BF
5.3.2 Electronics test points
As shown in Figure 5-1, there are several test points located on the electronics.
A. Ground
B. Test freq IN
C. TP1
The electronics is capable of internally generating a flow signal that may be used to
simulate a sensor signal to perform electronics verification with a Handheld Communicator
or AMS interface.
INTERNAL SIGNAL FAULT The flow data encoded on a pulse signal from the Sigma-Delta ASIC to VDSP has
been lost. A power cycle may resolve the problem. Also check the inter-board
connector. If the problem persists, replace the transmitter electronics.
TEMPERATURE ELECTRONICS
FAILURE
The electronics circuitry that supports the measurement of the Process
Temperature has failed. The transmitter can still be used in a non-Process
Temperature mode.
PROCESS TEMP OUT OF RANGE The Process Temperature is beyond the defined sensor limits of -50 °C to 427 °C.
PROCESS TEMP ABOVE SAT STEAM
LIMITS
The Process Temperature is above the high limit for Saturated Steam density
calculations. This status only occurs when the Process Fluid is Temperature
Compensated Saturated Steam. The density calculation will continue using a
Process Temperature of 320 °C.
PROCESS TEMP BELOW SAT STEAM
LIMITS
The Process Temperature is below the low limit for Saturated Steam density
calculations. This status only occurs when the Process Fluid is Temperature
Compensated Saturated Steam. The density calculation will continue using a
Process Temperature of 80 °C.
FIXED PROCESS TEMPERATURE IS
ACTIVE
Due to a problem detected with the thermocouple, a configured fixed Process
Temperature is being substituted for the measured Process Temperature. This fixed
Process Temperature is also being used in saturated steam density calculations.
INVALID MATH COEFF The area of nonvolatile memory used to store the curve fit coefficients for the
coprocessor calculations does not contain valid data. This data can only be loaded at
the factory. Replace the transmitter electronics.
CJ TEMP ABOVE SENSOR LIMITS The temperature reported from the Cold Junction temperature sensor is above CJ
sensor limits.
CJ TEMP BELOW SENSOR LIMITS The temperature reported from the Cold Junction temperature sensor is below CJ
sensor limits.
Figure 5-1. Electronics Test Points
Message Description
A
C
B